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What's the difference between Ruby's dup and clone methods?
...ithout affecting the color method of apple, but if we clone another object from apple, that new object will reference the same objects in copied instance variables as apple.
dup will also produce a shallow copy of the object it is copying, and if you were to do the same demonstration shown above to...
What is the difference between .text, .value, and .value2?
...alue or .Text is usually a bad idea because you may not get the real value from the cell, and they are slower than .Value2
For a more extensive discussion see my Text vs Value vs Value2
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Remove all elements contained in another array
I am looking for an efficient way to remove all elements from a javascript array if they are present in another array.
14 A...
How to add and get Header values in WebApi
I need to create a POST method in WebApi so I can send data from application to WebApi method. I'm not able to get header value.
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Why use Dijkstra's Algorithm if Breadth First Search (BFS) can do the same thing faster?
Both can be used to find the shortest path from single source. BFS runs in O(E+V) , while Dijkstra's runs in O((V+E)*log(V)) .
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Using `textField:shouldChangeCharactersInRange:`, how do I get the text including the current typed
...n worked: stackoverflow.com/questions/388237/… Basically, drag'n'drop from the UITextField into your code (to create a function), then right-click on your TextField, and drag'n'drop from the circle for the "Editing Changed" to your new function. (Sigh. I miss Visual Studio sometimes..)
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PHP - How to check if a string contains a specific text [duplicate]
...ronizaçãoSA The ! operator will affect the falsiness of the return value from strpos which means === won't work the way it's intended.
– Dai
Jun 27 '18 at 15:04
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RE error: illegal byte sequence on Mac OS X
...s on demand:
Standard utility iconv can be used to convert to (-t) and/or from (-f) encodings; iconv -l lists all supported ones.
Examples:
Convert FROM ISO-8859-1 to the encoding in effect in the shell (based on LC_CTYPE, which is UTF-8-based by default), building on the above example:
# Conv...
Async/await vs BackgroundWorker
...ow, you could use TPL instead:
var synchronizationContext = TaskScheduler.FromCurrentSynchronizationContext();
Task.Factory.StartNew(() =>
{
int i = 0;
// simulate lengthy operation
Stopwatch sw = Stopw...
What's the state of the art in email validation for Rails?
...ted:
/\A[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]+\z/
That was adapted from http://www.regular-expressions.info/email.html -- which you should read if you really want to know all the tradeoffs. If you want a more correct and much more complicated fully RFC822-compliant regex, that's on that pag...